Ventilator.



E. 0. JANECK.

VBNTILATOR.

APPLIOATIQN FILED JULY 10,1912.

1,080,458, Patented Dec. 2, 1913.

Z7. ammi( EMIL O. JANECK, OFJYIADISON, WISCONSIN.

VENTILATOR.

.Specication of Letters Patent.

Alppiicati'on ledfJuly 10, 1912. Serial No. 708,626.

Patented Deo. 2,1913.

may be're-adily placed in'er removedfrom al window, which is' adjustable to enable it to fit a window of any ordinary size and which also serves to admit light and air to a room wit-hout creating `a draft across the room and to exclude rain, wind, and snow.

lhcvinvention consists in the construction, ,combination and arrangement of devices 'hereinafter described and claimed.

f .In the accompanying drawing -Figure 1 is' an elevation of a ventilator constructed in kaccordance with my invention, showing he inner side of the ventilator. Fig. 2 is a vertical sectional view of the same'on-the plane indicated by the line a-va of Fig. l. F ig. 3. iS a horizontal sectional view on the plane indicated by the line b-b of' F ig. 1.

In accordance with m invention, I pro- Vide a suitable frame which is here shown as comprising a pair of vertical end bars 1 and a cross bar2 arranged at and connecting the lower ends of theend bars. The said end bars are here shown as and are, preferably channeled bars, made of sheet metal and are adapted to be readily fitted in the grooves in the sides of a window frame in which a sash operates. The ventilator frame may be fitted either above lor\below a sash as may be desired. The bar comprises a pair of elements 3 4 which are slidably related together and are, respectively, cpnnected to the end bars 1, the element 3 bein formed at its upper and lower sides Wit outturned .flanges 5 which engage the upper and lower sides of the element 4 so that the said elements are connected together and are yet ada ted for sliding relative movement, accor ing to the width of the window or other opening in which-the ventilator is used.

M improved ventilator includes a series of s ats. These slats aref"arranged in pairs. The lower Slat 6 of each pair slightly overla the lower portion of the upper slat 7. T e slats are preferably made of sheet metal and are arcuate in form cross sectionally and arranged with their concaved faces opposed to each other, the concaved face of each lower slat being presented tothe outer side of the ventilator and the concave face of each upper slat being presented-to the inner side of the ventilator. Each of the slats 7-6 comprises a pair of cross sectional arcuate members 8-9 which are, respectively, attached to the end bars 1 and are slidably related so that the ventilator may be adjusted longitudinally to fit in a window of any ordinary size. Each member 8 is here shown as formed at its upper and lower sides with flanges 10, bent therefrom and which engage the corresponding upper and lower portions of the member 9 so that the said members 8;-9 of the slats are connected together and yet adapted for longitudinal adjustment.

It will be observed upon reference to Fig. 2 of the drawing that the cords of the -arcs formed by the reversely arranged and oposed members of the pairs of slats ,are inclined u wardly and inwardly and that lie shape and arrangement of the slats, while they serve to freely admit light andair also serve to deflect currents of air upwardly and, hence, prevent drafts from going across the room and direct the same upwardly to the ceiling. Moreover, the slats o my ventilator, owing to their construction and arrangement serve etfectually to prevent the entrance of rain and snow.

The members 7,8, owing to the fact that their concave surfaces are opposed and also owing to the fact that the cords of their arcs are inclined and that the members 7 are higher than the members 8 cause currents of air which pass'into the room through the ventilator to be deflected upwardly and caused to whirl and form vertices between the members 7-8 so that a considerable portion of the strength of said currents is expended in forming the vertices and as the currents escape from between the said members they pass upwardly and close to the inner side of the ventilator. Such currents as they enter above each member 7 and under the next higher member 8 are caught and also carried u wardly bythe first-named currents so tiiat the ventilator while admitting air to the room in the Window openin in which it is used prevents the currents o air from blowing directly across the room. The lower edge of each upper member 7 on the them. l

While I have herein shown a preferred' form of my invention, I would have it understood that changes may be made in the form, construction and proportion of the several parts without departing from the spirit of my invention and within theJ scope of the appended claims.

I claim V l. A ventilator of the class described including a pair of inclined slats having opposed concaved faces and arranged in partially overlapping relation, one higher than the other, the concaved face of the lower slat being presented to the outer side of the ventilator.

2. A ventilator including a pair of slats of arcuate form cross sectionally, said slats being arranged in partially overlapping relation, one in a higher plane than the other and with their concaved faces opposed.y

3. A ventilator including a pair of slats of arcuate form cross sectionally, said slats being arranged in partially overlapping relation, one in a higher plane than the other and with their concaved faces opposed, the concaved face of the lower slat being presented to the outer side of the ventilator and that of the'upper slat being presented to the inner side of the Ventilator.

4. A ventilator including apair of slats of arcuate form cross-sectionally, said slats being arranged in partially overlapped relation, one higher than the other and with their concave faces opposed, the concave face of each lower slat being presented to the outer side of the 'ventilator and that of the upper slat being presented to the inner side of the ventilator, the `lower edge of each upper slat projectingloutwardly from the ventilator beyondthe vertical plane of the lower edge of its companion lower slat and the inner upper lower-edge of each lower slat projecting inwardly from the ventilator beyond the vertical plane of the inner edge of,

its companion upper slat.

In testimony whereof I aiix my signature in presence of two witnesses.

EMIL O. JANECK.'

Witnesses:

JOHN C. FEBLANDT, A. E. CHATTER'roN. 

